UK police search for missing schoolgirl

In this undated handout photo provided by the Metropolitan Police, missing schoolgirl Tia Sharp poses for a photo, Aug. 8, 2012, in England. The 12-year-old has been missing since Aug. 3, 2012, when she left her grandmothers home to go shopping in nearby in Croydon, a borough in south London.

Credit: Metropolitan Police Dept.

In this undated handout photo provided by the Metropolitan Police, missing schoolgirl Tia Sharp poses for a photo, Aug. 8, 2012, in England.

Police clear vegetation and search with dogs close to the family home of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Police clear vegetation and search with dogs close to the family home of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Police clear vegetation and search with dogs close to the family home of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Police clear vegetation and search with dogs close to the family home of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Candles, photos and messages written in chalk adorn the pavement by the bus stop where the last unconfirmed sighting of missing schoolgirl Tia Sharp was made on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

Police clear vegetation and search with dogs close to the family home of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.

Credit: Matthew Lloyd/Getty Images

A satellite media truck parked outside the house of the grandmother of missing schoolgirl Tia Sharp on Aug. 8, 2012, in New Addington, England.